oj.uz

Submission #924081

# Submission time Handle Problem Language Result Execution time Memory
924081 2024-02-08T11:42:40 Z vjudge1 Growing Vegetable is Fun 3 (JOI19_ho_t3) C++17
100 / 100
 456 ms 757760 KB 
#pragma GCC optimize("Ofast")
#pragma GCC optimize("inline")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("inline-small-functions")
#pragma GCC optimize("-finline-small-functions")
#pragma GCC optimize("-fexpensive-optimizations")
#pragma GCC optimize("inline-functions-called-once")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2")
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#define pb push_back
const ll N = 105;
const ll inf = 1e9 + 37;
#define endl '\n'

/*
- have fun!
- monovariants?
- invariants?
- bs on ans?
- phrase it differently?
- quirky constraints? 
- dp? 
- greedy? 
- find slow solution and try to optimize?
*/

void solve(void){
  int n;
  string s;
  cin >> n >> s;
  s = "0" + s;
  for(int i = 1; i <= n; ++i){
    if(s[i] == 'R') s[i] = 0;
    else if(s[i] == 'G') s[i] = 1;
    else if(s[i] == 'Y') s[i] = 2;
  }
  vector<int> k[3];
  k[0].pb(0);
  k[1].pb(0);
  k[2].pb(0);
  for(int i = 1; i <= n; ++i)
    k[(int)s[i]].push_back(i);
  vector<array<int, 3> > pre(n + 1, array<int, 3>{0, 0, 0});
  for(int i = 1; i <= n; ++i){
    pre[i] = pre[i - 1];
    pre[i][s[i]]++;
  }
  int dp[n + 1][n + 1][n + 1][3];
  for(int r = 0; r <= n; ++r)
    for(int g = 0; g <= n; ++g)
      for(int y = 0; y <= n; ++y)
        for(int c = 0; c <3; ++c)
          dp[r][g][y][c] = inf;
  dp[0][0][0][0] = dp[0][0][0][1] = dp[0][0][0][2] = 0;
  int c[3] = {0};
  // cout << pre[n][0] << ' ' << pre[n][1] << ' ' << pre[n][2] << endl;
  for(c[0] = 0; c[0] <= pre[n][0]; ++c[0]){
    for(c[1] = 0; c[1] <= pre[n][1]; ++c[1]){
      for(c[2] = 0; c[2] <= pre[n][2]; ++c[2]){
        for(int col = 0; col <3; ++col){
          if(!c[0] and !c[1] and !c[2])
            continue;
          int& ans = dp[c[0]][c[1]][c[2]][col];
          if(c[col] <= 0){
            // cout << c[0] << ' ' << c[1] << ' ' << c[2] << ' ' << col << endl;
            continue;
          }
          // cout << c[0] << ' ' << c[1] << ' ' << c[2] << ' ' << col << endl;
          int i = c[0] + c[1] + c[2];
          int ni = k[col][c[col]], d = 0;
          for(int j = 0; j <3 ; ++j){
            if(j == col)
              continue;
            d += (pre[ni][j] >= c[j] ? 0 : c[j] - pre[ni][j]);
          }
          ni += d;
          for(int j = 0; j <3; ++j){
            if(j == col)
              continue;
            ans = min(ans, dp[c[0] - (col == 0)][c[1] - (col == 1)][c[2] - (col == 2)][j] + ni - i);
          }
        }
      }
    }
  }
  int ans = inf;
  for(int i = 0; i < 3; ++i){
    ans = min(ans, dp[pre[n][0]][pre[n][1]][pre[n][2]][i]);
    // cout << dp[pre[n][0]][pre[n][1]][pre[n][2]][i] << ' ';
  }
  if(ans == inf)
    ans = -1;
  cout << ans << endl;
}

signed main(){
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  // signed t; cin >> t; while(t--)
    solve();
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct

Subtask #2
55.0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 2 ms 2904 KB Output is correct
19 Correct 2 ms 3160 KB Output is correct
20 Correct 2 ms 2908 KB Output is correct
21 Correct 2 ms 2908 KB Output is correct
22 Correct 2 ms 2908 KB Output is correct
23 Correct 2 ms 2904 KB Output is correct
24 Correct 2 ms 2908 KB Output is correct
25 Correct 2 ms 2908 KB Output is correct
26 Correct 2 ms 2908 KB Output is correct
27 Correct 2 ms 2908 KB Output is correct
28 Correct 2 ms 2908 KB Output is correct
29 Correct 2 ms 2908 KB Output is correct
30 Correct 2 ms 2908 KB Output is correct
31 Correct 2 ms 2904 KB Output is correct
32 Correct 2 ms 2908 KB Output is correct
33 Correct 2 ms 2908 KB Output is correct
34 Correct 2 ms 2896 KB Output is correct
35 Correct 2 ms 2652 KB Output is correct
36 Correct 2 ms 2908 KB Output is correct
37 Correct 2 ms 2648 KB Output is correct
38 Correct 2 ms 2908 KB Output is correct
39 Correct 2 ms 2908 KB Output is correct
40 Correct 1 ms 2908 KB Output is correct
41 Correct 2 ms 2908 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 456 ms 757580 KB Output is correct
3 Correct 402 ms 751888 KB Output is correct
4 Correct 398 ms 757312 KB Output is correct
5 Correct 398 ms 757756 KB Output is correct
6 Correct 422 ms 757504 KB Output is correct
7 Correct 394 ms 751896 KB Output is correct
8 Correct 403 ms 751944 KB Output is correct
9 Correct 396 ms 746324 KB Output is correct
10 Correct 404 ms 757760 KB Output is correct
11 Correct 401 ms 757332 KB Output is correct
12 Correct 62 ms 104416 KB Output is correct
13 Correct 139 ms 244604 KB Output is correct
14 Correct 227 ms 426064 KB Output is correct
15 Correct 397 ms 757588 KB Output is correct
16 Correct 394 ms 757332 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 2 ms 2904 KB Output is correct
19 Correct 2 ms 3160 KB Output is correct
20 Correct 2 ms 2908 KB Output is correct
21 Correct 2 ms 2908 KB Output is correct
22 Correct 2 ms 2908 KB Output is correct
23 Correct 2 ms 2904 KB Output is correct
24 Correct 2 ms 2908 KB Output is correct
25 Correct 2 ms 2908 KB Output is correct
26 Correct 2 ms 2908 KB Output is correct
27 Correct 2 ms 2908 KB Output is correct
28 Correct 2 ms 2908 KB Output is correct
29 Correct 2 ms 2908 KB Output is correct
30 Correct 2 ms 2908 KB Output is correct
31 Correct 2 ms 2904 KB Output is correct
32 Correct 2 ms 2908 KB Output is correct
33 Correct 2 ms 2908 KB Output is correct
34 Correct 2 ms 2896 KB Output is correct
35 Correct 2 ms 2652 KB Output is correct
36 Correct 2 ms 2908 KB Output is correct
37 Correct 2 ms 2648 KB Output is correct
38 Correct 2 ms 2908 KB Output is correct
39 Correct 2 ms 2908 KB Output is correct
40 Correct 1 ms 2908 KB Output is correct
41 Correct 2 ms 2908 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 456 ms 757580 KB Output is correct
44 Correct 402 ms 751888 KB Output is correct
45 Correct 398 ms 757312 KB Output is correct
46 Correct 398 ms 757756 KB Output is correct
47 Correct 422 ms 757504 KB Output is correct
48 Correct 394 ms 751896 KB Output is correct
49 Correct 403 ms 751944 KB Output is correct
50 Correct 396 ms 746324 KB Output is correct
51 Correct 404 ms 757760 KB Output is correct
52 Correct 401 ms 757332 KB Output is correct
53 Correct 62 ms 104416 KB Output is correct
54 Correct 139 ms 244604 KB Output is correct
55 Correct 227 ms 426064 KB Output is correct
56 Correct 397 ms 757588 KB Output is correct
57 Correct 394 ms 757332 KB Output is correct
58 Correct 452 ms 757548 KB Output is correct
59 Correct 423 ms 757320 KB Output is correct
60 Correct 423 ms 746288 KB Output is correct
61 Correct 426 ms 752112 KB Output is correct
62 Correct 411 ms 757548 KB Output is correct
63 Correct 411 ms 757332 KB Output is correct
64 Correct 433 ms 757564 KB Output is correct
65 Correct 429 ms 751956 KB Output is correct
66 Correct 417 ms 740684 KB Output is correct
67 Correct 433 ms 757508 KB Output is correct
68 Correct 426 ms 751760 KB Output is correct
69 Correct 424 ms 757584 KB Output is correct
70 Correct 425 ms 757584 KB Output is correct
71 Correct 425 ms 751856 KB Output is correct
72 Correct 415 ms 752372 KB Output is correct
73 Correct 399 ms 757332 KB Output is correct